Loading a module from outside the application directory in AIR

That has taken a fair bit of Googling to figure that one out. Because of security sandbox restrictions, when using the url of the ModuleLoader component, modules can only be loaded from the application directory (or any of its subdirectories).

Providing a null url parameter for loadModule triggers and error. Providing an empty string "" or a file that doesn't exist in the application directory like "test/MyModule.swf" appears to work. I would need to figure out why.